|Why transmit outside the WSPR section, when you can mess things up for people?|
Of course, it's not FT-8 or its creators that's at fault; that lies squarely with operators, many of whom are clearly experienced.
This is highly symptomatic of recent developments in the amateur radio world. Click an icon on a piece of software, think what you're doing is fine because 'the software sets everything up', and mindlessly mess-up other people's hard work.
So, if you operate FT-8 or any other mode near the WSPR section of any band, please accept it takes very little bandspace, and make sure your transmissions are outside of the WSPR portion, making sure to allow for the positive shift due to the tone frequency, which is not the same as the frequency shown on your rig's panel!