I'm in medical school (in Europe so it's a 6-year degree) and it's not really an option to choose between owning a laptop or an iPad. You need both. I highly recommend getting a decent MacBook Pro (preferably with at least 512GB disk space) that you can afford and an iPad 6th gen or iPad Air with pencil (if you can't afford an iPad Pro after getting the MacBook).
In school, you need the iPad to take notes and carry those "massive textbooks" without carrying actual paperbacks. It will save you a lot of paper and backache (I carry around 3,000 PDF and epub books in my iPad 6th gen including Harrison, Robbins, Kaplan USMLE and Netter, also notes, lecture slides, recordings etc). You can use the iPad to practice on MCAT/USMLE exercises if you can get your hands on the PDF versions, as you can annotate the multiple choice questions and when you are done, you can delete the PDF and redo it all over again. If you are getting an iPad, try to get at least a 128gb version for more leeway.
I still use my laptop as some websites are better when accessed via MacOS. The laptop also has a bigger screen, so if I have to read something without having to be on the move, i still use my MacBook (especially to watch lecture videos, read histology images and anatomy atlases etc). I also have massive amount of files, so using the MacOS finder is more efficient to organise files than using iOS Files app. Normally I organise all my notes, videos using my MacBook. If I have to retype my notes, I also use my MacBook (due to the bigger screen). I also do many things on my MacBook that I can't do on my iPad, one of them is my other job which is coding.
I only carry my iPad to school because the MacBook is too heavy for me, also I like to read before class so iPad is more convenient for that. If I get a 12.9 iPad Pro, it will defeat the purpose of portability and weight (size and weight wise if you add a keyboard would most likely be pretty close to a MacBook, so might as well get a MacBook).
Usage wise, it's 50% iPad 50% MacBook during school term, and about 95% MacBook 5% iPad during school break.
I'm starting clinicals next semester this year (my 3rd year). I haven't decided whether I should get an iPad mini or stick with an iPhone. I'm also not sure how much exposure I would have to human body fluid as a medical student shadowing real doctors (one of my concerns would be how to get rid of blood spatter from an iPad mini, is there even such a thing? Would I even get blood splattered all over me? Am I worrying too much?
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Also just because you are not doing "computer-only features such as coding etc." now, it doesn't mean that you won't be doing those in the future. Your interest may eventually vary and you might be interested in something that require you to use a computer. A few friends from my medical school end up learning programming, taking AI and bioinformatics courses during the summer break via edX, Udemy, Coursera (to have an overview on how AI may impact medicine in the future etc). My other friends deejay in clubs to unwind and earn extra cash (using MacBook Pro). I code to relax. Medical school is really tough and burnout is inevitable. You need some outside interests to balance it out and you should not be limited by your tools (which you would be if you only have an iPad).