This is true... Especially when you're at public places such as mall/workplace.... There are hundreds of radio wave broadcasting at all directions so there's almost close to no difference having just 1 more device beside you...

Sometimes you don't even noticed the microcell is actually just right on top of you while you're drinking coffee in the mall...

I'm not talking about wifi for sure... I'm referring to all the devices in public area such as cellphones and tablets .... There are hundreds or even thousands of them beaming signal at all directions... From your pocket... Extend to your close family and shoppers ...

So it's very close to no difference with additional 5G radio from the laptop...

I'm telco engineer myself so I've been carrying test phones and tablets with me all the time. So to "minimize" the impact, I usually turn all devices to airplane mode when it's not in used. Only main phone are on with data all the time.