Lore/logistics question

I’ve been passingly getting more and more into battle tech over the last few months, and I was wondering if there was a good lore explanation behind why things like tanks, infantry and air support are still used as much as they are in this setting?

Most of my exposure to the battle tech universe is from the video games, so it may be that the perception of how widely and readily deployed mechs are is skewed since mech combat is the focus in those settings.

But it seems like the difference in power between mechs and other military vehicles, even heavy tanks and light mechs like the locus, is very large. It also seems like while mechs aren’t employed as en mass as other military vehicles, they outclass them by a mile, and most other vehicles only serve as a minor inconvenience to mechs.

Is this just the videogame depiction of the power scaling? Because it seems like being someone deployed in an attack helicopter to defend a base when a lance can be air dropped in and level and entire reinforced location within minutes makes anything you do a delaying tactic at best.