Put a cuff on your own ankle for even 10min at even 200 or 225mmhg... you'll understand. Thigh tourniquet at 300+ setting? You wont make it even one minute (main reason those ppl always need gen anesth). If you like your ankle, then simply ask anesthesia... very impactful. It makes a big difference in pain.
Cuff also causes all 3 of triad: injury (crush vessels), stasis (obviously), and hypercoaguble state (pain + more anesthesia meds).
Other benefits are post op pain, edema, seeing vessels to avoid them (basically color anatomy... versus everything's white-ish with cuff up). You can do much better dissection without cuff inflated.
They're useful for some procedures and parts of others, but the way most DPMs use tourniquets is not necessary. If ortho does THA or humerus ORIF and vasc surg does carotid or fistula without tourniquet, I'd think we can at least do hammertoes, Haglund, ankle scope , most bunions without it? (Yes I use cuff briefly on calc osteotomy or hindfoot fusions or parts of things that just bleed a lot... or pts who just do for whatever reason).