No, and calling people children is unproductive. Especially in tech, RTO mandates can require significant expense, in time and money. Working from home, I spend another $20/mo for more bandwidth so my zoom experience doesn't hinder meetings. To work from a local office, I'd need to buy and maintain a car and spend an hour a day risking life and limb in traffic; or spend two hours a day taking transit. Or, I could buy a very expensive apartment to shorten my commute to my office. If my office wasn't local, I'd need to relocate my family, buy a new house, on top of all those other expenses.

Negotiating with your employer to cover the rising cost of living, and especially expenses incurred by their policies, is a very mature thing to do. Why do you consider that behavior childish? If you're working a job that forces you to make lifestyle changes that you cannot afford, what do you think the mature response should be?