It is not a true, Ofcourse the Sun is getting brighter and increas its power but on the Earth there is a some kind of delikatne balance.
Impact of co2 - which can be seen by some people as quiet small(but it?s not) can generate much higher than usually concentration of metane which is much stronger warming gas. Then in Warm air of our planet will circulate more evaporated water which is also stronger warming gas, than co2 is.
Less amount of white ice in far north will give stronger absorbtion of solar radiation.
The coleration between human impact and co2 production and then warming observed by NASA and great reefs and Other parts of globe is difficult to ignor.
ignoring this resembles a bit of a worldview of people who think that vaccines are harmful Not seeing at the same moment How many humans lifes vactinations resqued.