For those not in the know:

Some european power companies put campaigns out on social media to mislead customers about low temperatures and pipes freezing, or mold problems or safety (long enough time and any temperature < 70 can cause frost bite).

Their profit is a % based on power usage. If people cut back due to high costs, their profit tanks. These companies are hurting this winter as people cut back on usage due to energy costs.

Of course it's grossly misleading, and anyone who finished 4th grade knows it doesn't make sense, but some people like OP fall for social media bullshit.

Water doesn't freeze until 32F, and humidity not temperature causes mold problems. And given cold air holds less moisture, it's actually very unlikely to get mold from keeping your home cool unless you've got condensation building up, which is somewhat hard to accomplish. In the summer however, if you don't have the AC on OR windows open for proper ventilation to correctly keep air moving you will get a mold problem, especially around here.

They shamelessly prey on the elderly with this crap to make sure they get their money.

Of course you can put on a sweater and use a blanket. You won't suffocate overnight (seriously, some elderly people now believe this because infants aren't supposed to have blankets).