Yeah see this all the time :(
Senior is often about time in industry not competence. A lot of 'senior' engineers are completely ineffective and seemingly unable to ever become effective. They just joined the industry a while ago and are treading water and tricking the next hiring manager that they were called 'senior' at their last job so of course they are a 'senior' now. If they aren't applying for 'staff' level jobs.
The correlation between being smart, getting things done, speeding everyone up, being trusted etc and 'seniority' is not causal :)