Well I agree. Your shins have gotten used to it, combined with the fact that you're stronger.
Training your legs and well fitted boots are no doubt the best way to minimize or avoid shin bang.
Alot of people tends to just come up with a single advice, but that's what they needed. Other people are just looking for that magic trick so you don't have to buy new boots. But that being said: in alot of cases there's no magic trick.
You're poor and don't have money for new boots. I say: that sucks, you shouldn't have bought the boots in the first place then. So suck it up and get some new boots it's worth it.
Two seasons ago I was staying a season in Whistler; 7 months. I went to a random shop and bought some of the first SPks I found. They were comfy and the young guy (a shopworker, not a bootfitter, theres a difference) said they would fit me good, so I bought them. I skied in them for the rest of the season and HATED MY LIFE. I did alot of bootfitting etc and nothing helped. I was on painkillers for 4 months, no joking. And even then I had to take days off because it hurted too much. You can't just suck it up if the shin bang is too bad guys. Get real, shin bang is an injury. In lesser cases you can ofc suck it up, but still don't just tell every kid to do so.
I didn't have any money at the time. But I regret it so much that I just didn't go to another bootfitter and get that well fitted boot.