I've always found this a strange assertion. Decades ago perhaps this was true, in that such bits were a touch obscure and required a search. Except in my case, where I tagged along with a friend to a HAM show and picked up a set of security bits on a lark. That turned out to be terribly useful over the years.

Even a pretty standard multi-bit set (say 20-24 bits and a driver handle) I got ages ago had several sizes of torx bits. These days, any half-decent hardware store stocks torx drivers and bits it seems. That's not even counting what I'll imagine is a few clicks online to obtain virtually any bit needed.