No, it really is not the flu at all.
The coronavirus is spreading a lot faster than "normal" flu. It is also a new virus, so we don't have any immunity against it, unlike with the flu, for which there are vaccines and many of us have at least some immunity to it due to previous exposure. The symptoms are worse than flu in many cases. And it also has a lot higher mortality rate - the flu has a mortality rate of around 0.1%, while the average mortality rate of coronavirus is currently estimated somewhere between 2.5-3.5%. Which means that while 1 out of every 1000 people with the flu might die, with the coronavirus, it's around 25-35 people out of every 1000. And no, it wouldn't be just older people (but even if it would, do older people's lives not matter? The mortality rises rather quickly for people over 40...)
If the virus is allowed to spread uncontrollably like the flu and we do nothing to prevent it from spreading, we should expect a worldwide death toll in millions. Some flu...
Treating the coronavirus as "just the freaking flu" is irresponsible at best, and potentially life-threatening to everyone around such person (including themselves) at worst. (Which is also why I had to respond, even though I expect you won't care anyway.)
We certainly shouldn't panic about the virus. That helps nothing and no-one, it only makes everything more difficult for everyone. But we absolutely shouldn't underestimate it and/or downplay the potential risks either.