well indeed switching over to the new game is more of distraction, its just to refresh the mind nothing more and its probably just an escape from the lose streak but in my opinion it could helps a little to just calm the mind since with calmer mind it might lead to another future victory but can't deny the fact that like as you said, too much of anything is bad, i mean being too fixated so hard just because we are eager to compensate, thats definitely bad behaviour that might lead to another streak of losing just like you described.
at the end of the day, retreating just for the sake of not losing too much is always the best strategy, things can be sorted out in the future and all can wait.
what better is to make the right strategy before going in again, its true, pros knows when to retreat and thats what sets them apart from the newbies.
but it could also be just the nature of that pros in which they have calmer mind so they know what to do next and not to do some useless things.
Switching to other games is good as long as you still have bankroll, jumping from one games to another will refresh your mind and you will not feel boring while gamble. But if people switch games in order to earn money and thinking the current games have no luck due to they ever win big, it's really wrong.
Gambling is just one of many ways to entertain, taking a break for few days or weeks aren't wrong if you're still emotional with previous losing streaks.