Perhaps sound wise, but you are unlikely to actually damage things from what I know
With an otl, it’s pretty load sensitive, and due to the nature of the design, it’s better at driving voltage rather than current. Output impedance also plays into this with lower dampening factor and impedance ratios which can really change how some lower impedance headphones react as well. Overall otl designs just really aren’t designed for driving lower impedance loads, esp ones that are fairly current demanding like planar for example. Using a transformer in the design to step down the voltage to lower voltage with higher current for lower impedance loads is desirable for lower impedance or more current hungry loads in a tube design. Not really someone who looks too deeply into topology nor an electrical engineer, so don’t know too much about how things work, I just know that most otl I’ve tried didn’t really sound all that great with lower impedance cans or more demanding planar lol. I think your lacking juice statement is somewhat right since it can’t make that much power at lower impedance