Armchair theory on board can be established by any logic

Trend-following pyramiding can be completely an armchair theory

Because you can't take bets like reverse pyramiding averaging down; some aspects also change in nature

When you were doing reverse pyramiding averaging down, you could make losses go to infinity

But with trend-following pyramiding you can't make unlimited profits; you must realize profits somewhere

Even if you take profits at such times, you won't earn much due to the losses accumulated up to that point

Trend-following pyramiding is a completely automated trading-only logic

If you were to trade manually

Clearly it would be better to do it in one shot

It's better to use an alert indicator to manually cut losses rather than a stop loss, since it also reduces losses by the spread