This was the exact same argument when 3G was introduced.
This was the exact same argument when 4G LTE was introduced.
BTW, it seems very odd that you would use WiFi as an argument against getting 5G. Why get any cellular service if you can just use WiFi?
Also:
Ah, since you bring up 3G and 4G and LTE. Whatever happened to:
-Reaching the theoretical speeds of any of those networks?
-Finishing the deployment of any of those networks?
5G is completely uninteresting to me because the pattern has repeated multiple times now and will just be repeating again:
-Talk up theoretical performance.
-Roll it out very slowly.
-Never reach the theoretical performance.
-Never reach a respectable deployment coverage.
-Start over with 6G.
What we should be doing is putting the money into expanding LTE infrastructure, and providing more people with adequate coverage and top speeds. LTE can be much faster for some people than others have ever seen.
Meanwhile, LTE is still heavily throttled and limited and expensive. What business do we ("we" meaning carriers) have moving all efforts on to another infant network when we haven't even done right by customers yet on any previous generation network? Clearly this is because they are intent to continue robbing everyone and justifying high prices by always moving the bar forward, even if there isn't much of an improvement.
My usage habits of cellular data have not changed one bit from 3G to 4G to LTE. It is still subject to frequently-poor network conditions, still performs worse than Wi-Fi, still heavily limited, throttled, and expensive. Nothing about the plans for 5G will change any of this.