Sure, that
probabbly is fine 99.999% of the time. But the one time it
doesn't work, and you do mangle the deeply recessed screws is the time
you have real problems trying to get them out.
I'm not performing this operation 100,000 times. If I were, I
would definitely go out and get the long handled T15 Torx
Screwdriver.
It just takes the machine you're working on to have overtight screws, or
the flatblade to be a bit too narrow to strip the heads and then you have
problems.
It is claimed that 'the bad workman blames his tools'. I have always
thoguht that this comes from the fact that the good workman buys good
tools, looks after them, and uses the right tool for the job.
I'm not sure who makes that claim, though it is a saying from
folklore. A true craftsman can make do with what is available,
and leverage his skills and dexterity, rather than just go out
and buy more specialized tools.
A true craftsman (and for that matter a hardwre hacker) can, and will,
make his own tools were necessary, sure. This is a far cry from using the
wrong tools. I don't think you'll find _any_ craftsman who would use a
flatblade screwdriver on a Torx head screw (or on a cross-head screw).
Nor will you find him using a screwdriver as a chisel or a pry-bar. Or
using a hammer to get a part off a shaft when a puller is the right tool
to use.
I have read many books on engineering, clockmaking, etc, and they all
make the same sort of point. There are specialised tools that you need.
Many of them can be made in a reasonable workshop, and in some cases
that's the only way to get them. None of thse books recomend using the
wrong tools...
-tony