It's all relative. The 'slow' 256GB drive is 1500MB/s. Sure, that's only 50% of the speed of the 512GB drive, and a quarter of the 1TB in the M2 Pro, but the thing is still blazing fast.
Of course, it's nice to have more storage, and 8GB RAM will be an issue for some, but if all you really need is something to handle web browsing & productivity apps then any of these options is going to be perfectly fine. Of all the reasons to avoid the M2 base model though, the speed is really at the end of the list.