Why these tasks resist being squeezed in
Stripping and sealing a floor takes it out of use for a working day at minimum, and the surface is unsafe while it is wet. Carpet extraction needs furniture moved and hours of drying before a room can be reoccupied. High-level work requires the floor beneath cleared and a platform positioned. None of these can be compressed into an evening in an occupied building without either cutting the process short or creating a hazard.
The result of trying anyway is worse than not doing it. A floor sealed without adequate cure time marks immediately, carpet reoccupied while damp resoils faster than before, and high-level work rushed around obstacles gets partial coverage. Doing them properly during a closure produces a result that lasts for months; doing them badly produces a cost with no benefit. That is the strongest argument for planning them properly rather than attempting them opportunistically.
