Except that might not really be true. I had a friend of mine die of brain cancer in 2019. Dude was constantly on his cellphone when he was younger, and it matched the side of his head in the MRI scans. Could it be coincidence? I think it's much more likely some people are genetically sustainable to biological damage to non-ionizing radiation. It's probably a small percentage, but there are a lot of cases in the courts, even with modern LTE phones. The phone companies are going to do whatever damage control to make this seem like it's a non-issue, while at the same time any couple trying to have a kid will have fertility experts tell them to not carry their cellphones in their pockets.
These are also slow cumulative effects, so it's not like these people won't pass on those traits. It might be another century, but at some point clusters of families with brain cancer won't be deniable. For the vast majority of peoples it's a non-issue, but I don' think it holds true for everyone. People going on about how it cannot possibly harm DNA are probably just going by news articles vaguely based off studies that are probably funded by cellphone research groups.