In theory, you don't have a choice about this; everyone needs TCP-friendly flow control, whether they want it or not, or the network experiences either congestion collapse or persistent unfairness.
You mean to say everyone has to use the same congestion algorithm in order for TCP flow control to work and not collapse the Internet? Apparently not Google, since they deployed TCP BBR and use it even for connections from the Internet, including on YouTube, and things seem to be beneficial rather than detrimental. It's not the only TCP implementation that is using stats other than packet drops to drive flow control. I'm guessing it works because both sides of the TCP connection can employ their own flow control for outgoing packets and the asymmetry doesn't do anything since they only care about controlling their own side.
