I'm sorry but this is not true. There have however been perception issues around viewbotting. One such:

For most of the life of host mode when a small stream would get hosted by a big stream, nearly all of the transitioned viewers would stay (through inaction) in the host's channel. Many would be AFK. The small streamer ends up with a large viewercount but a disproportionally "dead" chat, leading to cries of viewbotting.

Coincidentally, big-to-small hosts like this are frequently how fantastic but relatively undiscovered streamers get their "big break", further entangling the accusations with their success.

Source: Worked for five years at Twitch, built host mode

(PS: As someone who became good friends with some of these "big streamers" and those at Twitch combatting viewbotting, I can't help but feel insulted on both their behalves that the amount of invisible effort they pour into their craft so frequently gets shat on.)