Because it won't prevent game commencing restarts if T player leaves server.
I'll try to explain better - with deathrun plugin there's 1 T and 13 CT players on our server and when that 1 T player disconnects the map restarts as soon as someone else is put into T team so there will be no use of bot if it sits in specs...
Searching this forum/google i found at least 3 bot plugin examples but none of them worked as asked in topic title. 1 of them just spawned, another spawned invisible and 3rd bot spawned outside the map...