Truly dreadful advice in my opinion. This bizarre myth that training in a down-turn is “the best time” is total unsubstantiated rubbish. There is zero evidence to support that notion. Zero.
You need luck and timing in this industry, one of those you can control. You are correct that no-one can predict the situation in 2-5 years time, so why rush into it know when we know it is literally the worst time for aviation since the advent of flight?