PMBOK 6th Ed. Section 4.5.3.2 change requests may be issued to expand, adjust, or reduce project scope, product scope, or quality requirements and schedule or cost baselines. Change requests are processed for review and disposition through the Perform Integrated Change Control process.
As the other answers have said, PMBOK does not say that change should be resisted but that it should be controlled. However, it is not uncommon to see change controls put in place with the intention of limiting the amount of change. Project Managers tend to be associated with work that takes a more predictive rather than adaptive approach and this often means the PM's focus will be on the project rather than the product. Rightly or wrongly the PMs role may therefore be perceived as putting limits on change or acting as a gatekeeper - by requiring extra administration and approval steps before work on a change can begin for example.