Airspeed is not too difficult to control in a C210 with basic attitude flying. The references to people exceeding Vne are likely to have occurred when they got the nose down attempting to descend out of cloud, or attempting to proritise and maintain altitude, rather than prioritise Va. You need Va to be able to get roll angles back to zero asap because 60 deg + will happen (too) rapidly.
Descending per se to escape also potentially puts them at LSALT but still IMC with little ability to control altitude in turbulence and also exposes them to being caught there inside a rain core which can drag its surrounding air mass down with it at > -1000 fpm.
A constant power setting / constant attitude to maintain Va, and accepting loss of control over altitude is a lot safer, since the big black cloud's performance inputs in either direction are going to happen a lot faster than yours.