Sure. Except you gain universal compatibility for all distros that have flatpak and aren’t building all the different package formats. Makes it much more attractive for actual developers to package since it’s only done once.
There’s no right answer here, but there are definite benefits.
I’ve had many little issues since I moved to Linux years ago, most of which would never have been an issue if flatpaks were there at the time. My experience has been better with them.