Exactly!
This is the tactic of Jiffy Lube and its clones, and you would be well advised to AVOID them at all costs. If you do some searching on this site, you will find literally scores of posts from people whose (pick one or more): engine, transmission, differential, brake hydraulic system, cooling system…was ruined by the untrained charlatans at those quick lube places.
That being said, I do suggest that you have your brake fluid changed every 3 years/30,000 miles. If you do not know why, then post back for an explanation.
As to the power steering fluid flush–NOT necessary.
Get into the habit of taking your vehicle to a well-reputed independent mechanic’s shop for its maintenance. The cost will be no higher, the personnel will actually have expertise to do things correctly, and you will be less likely to be pressured into questionable maintenance procedures.