This is classic short term thinking. Whether or not AI is a bubble like the dot com bubble remains to be seen. But gamers have been buying Nvidia since before the dot com bubble and it is a market demand that has existed for a long time and will continue indefinitely. It doesn't make sense to cede this market to AMD.
I purposefully compare AI boom with the dot com bubble because we all knew how important the internet became eventually, but investments in it were way ahead of its time.