It's the lack of recognition of the pressure it puts on other parts of the team.
Within my team, I will have four directors out of seven off in the second half of the year for maternity/paternity leave. My company now offers a basic 12 weeks for paternity leave, plus more and more people are opting for shared parental leave, so it's not just a challenge confined to new mothers. In theory, this is all good and it's positive that new parents have more time with their child.
However, that leaves me without 4 senior people, who would otherwise be bringing in work, and leading on complex projects. It's a niche role, and I'm trying to get cover in, but honestly I can only think of 2 or 3 people who might be suitable & they don't have the same level of client relationships, so that puts all the business generation pressure on the 3 directors who are still around. And other more junior people in the team will try to step up - that's a good growth opportunity for them, but leaves you with management issues when those on parental leave come back, and again, it's a lot of new pressure for less experienced team members.
The cost of maternity pay comes out of the team's P&L, plus the cost of the paying for anyone who comes in as cover, at a time that the team is probably going to be less productive because we're missing key senior people. But the expectation to deliver the usual profit margin doesn't get toned down by PLC who introduced these enhanced parental leave policies, and everyone is going to kick off if they don't get their usual bonus... This year is the most pressured, but its has been a continued headache of things to juggle for the last three years, and its those who don't have children who are always under strain to hold it together. And it is genuinely impossible to get appropriate maternity cover for these types of roles, I have tried and tried and the people with the skills and knowledge I need are not looking for roles for only a year.
It's the same around flexibility and working from home - great in theory, but it means that those who are in the office are taking all the work of informal training of new team members, picking up random queries, getting pulled into last minute in person client meetings. I know that people in my team who are stopping work between 3-5 for picking up kids etc are logging on again in the evening to catch up, but that still means that the immediate firefighting in the middle of the day is left to the non-flexible working people every time.