naiive idealism to the max:

medior+senior to junior: "hey, buddy, we need you to do this, here's the codebase, here's the button, here's what needs to happen when that button is clicked, here's the relevant files and classes, make it happen."

medior to senior: "so what you just said about how we should redo the whole order processing pipeline, na-ah, not possible. i've been in those parts of the code many times, and based on what i've seen, you either leave that thing mostly alone or nuke it from orbit and build a completely new module in its place, but these "medium adjustments" you're proposing... not feasible...

senior to medior: "okay, i've seen how slow your progress was on even the most basic-sounding bugs in those systems... looks like what you're saying makes sense."

senior to *EO: not possible to just do these changes with this budget and deadline, that wouldn't even cover the "unexpected bugs" overhead, either you let us do it properly as a new greenfield project, almost, or you're stuck with what we've got.

*EO: mmmkay, so that's 20 times more time and budget that is in the proposal?

senior: yup, something around those numbers.

*EO (with a pained but understanding expression) : go for it, imma explain to the rest of the EOs at the end-weeks's meeting.