It's not just action economy. It's that with the CONCENTRATION economy, blocking you from most of their other combat spells. The fact that subclasses built around spending their bonus action every round already (say, Horizon Walker and Beastmaster), get particularly screwed over is just icing on the cake.
Concentration choices are also something every spell caster deals with. Again, this is demonstrating the expectation that hunter's mark always be on. It doesn't have to always be on.
If it has to be their class feature, you'd imagine it should work with the rest of their class features, yeah. A Barbarian is not prevented from Reckless Attacking if they Rage, sort of a deal.
False equivalent, but rage also isn't always on and can be lost. It's chosen to be used by the player at times and not always there.
Spellcasting is also a class feature. The player, in choosing to use a different spell that needs concentration, is using their class feature. The same as any bard, wizard, or sorcerer who has to give up concentrating on a spell for another spell.
I'd argue that the mage hand spell is an example of a single spell being of specific importance to arcane tricksters but just because it is doesn't mean the rest of the class or subclass features don't exist, and it's similarly using that bonus action we were discussing even though steady aim and cunning action also both compete with that bonus action.
Abilities competing for bonus actions or concentration aren't some unique detriment to rangers. They are part of the game for everyone.
If 90%+ of play happens at levels that are not in that range, then yes, we can.
No, we can't. That part of the game exists whether you want to ignore it and those players or not. GG
It might not exist for you at your table but the game doesn't exist specifically for you at your table. ;-)