I did a similar injury 30 years ago - avulsion of anterior tibial spine extending through the tibial plateau , but mine went through the load bearing surface of the plateau - you dodged a bullet!! . I spent 3 days fasting for an operation that never happened - change of shift, new arrogant arsehole then decides it can be managed conservatively and unfortunately nobody bothered to do a CT because there was a step on my plateau that I've lived with for 30 years.
My advice is do everything you possibly can to get as active as possible as quickly as possible - so physiotherapy , and explore options for sports that are gentle on the knee ( eg water sports) . I put on 15 kg in the 18 months after that injury, and although I was eventually able to return to most sports , I went from being an A grade squash player to C , eventually giving up the sport - mostly because of the weight. I was back dirt bike riding within 3 months but had to be cautious when bush walking for the 18 months it took to regain relative stability in my knee . The anterior cruciate remains lax but I can live with that. I'll pop an anti inflammatory before any big days of activity , eg if I'm cycling for more than 5/6 hours or bush walking for more than 2 - but to be completely honest my other injuries bother me more than the knee now.
One thing I struggled with was regaining confidence. I was nervous so stopped bush walking into remote areas because of the risk of twinging the knee and not being able to get back. If I had my time again, I'd wear a knee brace / use a trekking stick and return to overnight hiking ASAP . It took about 5 years to get confident enough to return to extreme remote motorbike riding , I'd do 1-3 day trips and let the stiffness limit my confidence. Again, a brace might have helped with that. Ironically, I didn't wear my brace last time I crossed a dessert - it didn't play well with the wide tank on my ktm.
The trouble is, it's hard to scientifically prove physio really makes a difference to long term outcomes. You can't really do double blind trails, and there is selection bias if you compare those who invest in physio vs those who don't - so differences in motivation / socioeconomic status / expectations and pain behavior will cloud the results. Most doctors like proof that a therapy is effective before they will recommend it.
Don't forget, those same doctors spend their days seeing patients with long term musculoskeletal injuries seeking pain relief. I'm willing to bet they see far more people claiming " physio didn't work" than people not mentioning that it did. Try asking a pain psychologist about the effectiveness of physiotherapy and you are likely to get a totally different response to a sports physician!
So before calling the doctors " old school" , it might be worth considering their experience and expertise? It probably helps to choose a doctor who is older than you but still riding faster than you....I