Also allow me to point you to Mexico City - you can’t imagine the hell it is for car drivers when all the things you mention happen (rain, protests choking half the city, and the subway shut down due to either failure or a strike). I’m talking literally 4-5 hours to get to your in-the-city destination; I once spent 2 hours driving half a kilometer and it was only raining. Just in case your actual point is “it’s better to drive as you’re less vulnerable to an eventuality with public transport or alternative mobility”.
Overground, National Rail, DLR, the Elizabeth line, trams and buses are all working. And the few parts of the tube network that don't have any nearby heavy rail services (eg. the Hainault loop on the Central line) are mostly still running.
Sure, the non-tube services are (much!) busier than normal but this situation is actually a great demonstration of one of the most important factors in making public transport useful: route redundancy, so that if one is suspended for whatever reason there are reasonable alternative options for most journeys.