Edit: lifted trucks, after market front bars, louder exhaust with larger exhaust tips, truck nuts, American flags or thin blue line flags covering the rear window.. None of these are from government regulations
Also, size is only one prominent factor in masculinity. E.g. a pickup truck is frequently seen as more masculine than an RV.
Assuming most don't offroad; There was a study that said trucks are used for hauling/offroad less than 20%~ more than once a year). I can't find it anymore so you can call me on that.
Lifting a truck reduces efficiency by creating drag and uplift (I believe that's what it's called). It also raises the center of gravity which greatly reduces handling and increases the possibility of rolling over
Chunky off-road tires wear out faster, are less efficient, and reduce handling on the road.
Extra lights, as well as lifting your truck without adjusting the lights, blind other drivers creating a safety hazard.
So more gas, more money, less safety for everyone, but the person stands out more, like large horns on animal, it's all about peacocking.
And yes, I know this is done in other ways, fancy loud sports cars, showing off money, clothing, etc. If that was going to your response, then I'll throw down the whataboutism card and do a double reverse move and point out those have less effect on the environment and safety. Yes, I know fast fashion is bad for the environment, kids in blahstan, but it's about levels not bad or good.