They don't have to think about hands, the software they use does all the thinking for them, All they need to do is be fast on the mouse clicks and go with the software predictions. Sure it is not 100% guaranteed they are going to win every game, but if the program is right 30% of the time they will have an ROI of 30%.
I prefer to play one table at a time, relax while I play and try and win the game with my own brain power and skills, to me this is just another form of cheating, using programs to play games for you is profitable until the Poker site catch you using some illegal software, then they ban you from playing and confiscate your money.
All forms of software should be banned if it helps you to make the decisions, and all you need to do is follow it. This is anther reason i will never play for high stakes on-line, I don't trust some of the players!
If there is money involved, some people will try and find a way of beating the system and take all the money they can, but you won't find too many of them playing micro stakes and freerolls, if they did then just hope the programs that are being used are on the 70% fail rate.
I disagree with many of your statements here.
a) the player I was mentioning plays most of their tables while on GGPoker (3rd party HUD's/tracking software doesn't work on GGPoker). Their other tables played on Stars & 888poker are played without the use of a HUD. (many other MTT players play similarly)
b) 'if' the program was right (first off, the program is neither right or wrong. It merely keeps a record of your playing stats. while on the same tables with that player. ie. it'll show stats. like 'how many hands you've played in total (while on same tables as the player), 'what % of hands you play' 'what % you choose to 3Bet preflop', etc. etc. One would need large sample sizes for many of the stats. to have much meaning. It doesn't tell you what to do at all. One needs to interpret stats. (ie. "they are playing a lot of hands") and then make an adjustment accordingly... or not... if they have chosen to even access said stat.).
... IF the program was right 30% of the time that would actually result in that player being a LOSING player. (they would need to be 'right' 50% of the time just to break even (not including rake).
I'm not sure why it is difficult to imagine players who are capable of playing a large number of tables without cheating. I mean there are loads of them and it's easy enough to watch them online in a variety of ways.