In my humble experience, no one is ever pressured to alter documents. They ARE however, under unrelenting tremendous pressure to hit performance targets. The ones who buckle and falsify docs to hit the numbers are considered weak in a way, and weeded out. This is harsh, but it's the way it is.
On the flip side, anyone who seeks help cross functionally to understand the reports and the significant factors that drive them are given help. Larger operations that struggle are placed on team QIP, where multiple staff managers and division managers ask the struggling operation to identify the "barriers to success", divvie them up amongst themselves, and report back to the manager when their little piece was fixed. The manager is usually given all possible help before demotion or transfer is considered.
USUALLY, this is the case. Sometimes there are politics, someone isn't well liked, and they're hung out to dry. We can all tell a story where we've seen this. But its more the exception than the rule.
Finally, some people achieve a level of career success they're not really psychologically ready for. There's no system to reliably tell you whether someone will adapt to increased responsibility or crumble under the weight of it, until you put them in there. These are usually the ones who make people miserable for no good reason, then a few years down the road get fired for stealing, sexual or racial harassment, or some other stupid reason. Not that the reason is stupid, but the act is, by someone who damned well should know better, but lost their humility somewhere and suddenly thought they were too powerful to have something bad happen to them. Usually the Monday morning qb's can always say "I knew so and so was no good", but it's much tougher to be 100% accurate beforehand.