Exactly, aircraft are dynamic, they actively avoid threats and react to them in real time. Satellites can do so only in a limited way, if at all. There's so much space junk, out of commission satellites that can be turned into many, many, many projectiles that there are many things that can threaten satellites without any genuine countermeasures in place.
In any serious scenario satellites are gone pretty quickly. Not only are there dedicated anti-satellite systems already, these measures will improve and evolve further.
Satellites can be shot down, they can be deorbited, they can be neutralized through soft means, direct energy weapons, nuclear weapons. That doesn't even touch on things like deliberately producing large debris clouds or utilizing something like satellite-adequate birdshot.
The velocities in orbit turn everything into a destructive projectile. You just need a decent spread and let it cascade from there. You don't even need to destroy every satellite. You just have to seriously degrade the overall constellation to a degree where coverage becomes patchy or lower quality.
That is while redundancy with capable airborne, seaborne and land based radars in conjunction with satellites offer a far more robust framework for comprehensive coverage. Something that could definitely decide who loses less in a hot peer war.
TL;DR
DJTs and Elon Musks satellite obsession at the cost of other far more survivable, proven and reliable assets is kinda cringe tho