The problem is that the word "may" covers a wide range of probabilities. Yes, there is a small but non-zero chance of adverse reactions to the vaccine. But it's orders of magnitude less dangerous than contracting one of the diseases it prevents.
2 karma · joined February 6, 2013
A quick search will bring up tables of which device requirements will disallow which devices, so it's not an unheard of practice. But nobody is excluding potential customers out of spite, it's because the older harware genuinely can't handle the apps.