A pharmacist is perhaps in trouble for not following regulations? They set these rules because they've done studies about adverse effects, and those trials apparently only included folks up to age 45, so they don't know for sure what would happen to older people. Its the same reason most people can't get the Shingles vaccine until age 50 (even though LOTS of people under 50 get Shingles). The clinical data starts at 50 for that one.

You're not going to die or anything, but the rules are in place they won't give it to you so I recommend getting it while you can as it is clearly showing benefits over time. I got HPV shot before I aged out and it was completely paid for by insurance (because of the USA ACA).