When to use させていただきます vs いたします？

Question

I have read this answer, and while it helped me understand how the term came about, I am still confused about when it is ok or not to use it.

I understand is mostly ok to use it in situations where you need some sort of permission to do whatever you wanna do.

(オンライン会議で）すみません、先に抜けさせていただきます。- Excuse me, I will allow myself to leave early.

But in some other situations, it is really confusing to me if させていだだきます would sound weird or not:

レビューしていただきありがとうございます。お手数ですが、修正をいたしましたので、もう一度ご確認をお願いいたします。

Here, would it be ok to say 修正させていただきましたので instead of 修正いたしましたので？ I was told by native speakers that させていただきます wouldn't work well here, but they could not explain really well why.

I would also like to know if is there any way to use いたします to modify verbs the same way you can do with させていただきます？

飲む > 飲ませていただきます

飲む　> 飲むよういたします （or should I just stick to 飲みます？）

Answer 1

I’m glad you are surrounded by people who think it is weird. I have worked with a bunch of people who used that kind of language all the time at work. They would say things like 出張させて頂きました when they took that business trip because it was necessary for their job or even someone ordered them to. They say ～させて頂きます just to sound humble. For me the problem is worse than sounding uneducated. I found them to be frivolous and even irresponsible. They are essentially making their own action sound as though it is someone else’s decision. 出張させて頂きました would make sense only if you wanted to go, but the company regulations would prohibit you from having another trip until, say, next month, but your superior intervened and specially allowed you to go, or something like that.

In another example, stupid actors say things like 今回XXXの役を演じさせて頂きました at a movie premiere. They are supposed to be talking to the fans. The fans didn’t let them play any role. If someone did, it must be their producer. By saying 〜させて頂きました they are being humble towards the producer. Why do the fans have to hear it?

My advice: Don’t use it unless someone actually allowed you to do what you did.

As for いたします, it’s a humble form for します. So for it to make sense, します needs to make sense. 飲むよういたします would be understood as a deformation of 飲むようにいたします. While the latter is the correct humble form of 飲むようにします, it doesn’t mean the same as 飲みます. If I had to use いたします to say 飲みます, I would say 頂戴いたします. You would need some noun like that.