i would have to disagree with this! the Fighter having exclusive access to Reactive Strike, default level one not even as a feat you have to select, is kind of a big deal for crowd control in a world where most creatures don't have it. all you have to do is get up close to any enemy caster and you can interrupt their spells (and by starting at expert, a thing only fighters get, you have a much higher chance of doing so). even if we discount inventor-alchemist-thaumaturge as effectively casters, and remove archetypes entirely (which Marshal is specifically only available to martial classes but sure), Investigators have Shared Stratagem, Clue In, ways to Recall Knowledge for free (this is a buff/debuff in a system where most things have some kind of resistance/weakness worth knowing), and Forensic Medicine as a way to serve as your party's Healer, no magic required. If "oh but they use intelligence so they're basically a caster", we can look at Monks with the ability to remove actions entirely by applying stunned (even at range across the battlefield, if that's what you want to do!) or Stand Still. if monks are too mystical to count, we can look at Swashbucklers with Bon Mot, Dirty Trick, Demoralize, or even Fascinating Performance as ways to use different charisma-based skills to apply different debuffs (and gain panache in the process), each with mechanical paths you can go down if you want to specialize. It's not just Trips! If using flashy charisma is too much like a caster, Rangers can take the Outwit hunter's edge at level 1 to help with debuffs, stealth, demoralize, and recall knowledge—you can even order your animal companion to specifically take advantage of these if you want to have that tactical Warlord feel! If even having positive stats in cha int or wis is too much like a caster, we're still in luck—try a Remorseless Lash + Intimidating Strike build on either a Barbarian or a Fighter, and you can consistently apply frightened as a debuff even with 0 charisma! maybe I'm misunderstanding this point, but these are all things non-casters can do to setup/buff/debuff/heal by level 2 before adding magic or gear or anything else, yeah?