My SF stories tend to be descriptive (of scenes, characters, MC's POV and actions). There is almost no dialogue, other than descriptions of conversations. If written well is this story telling acceptable
As with all stylistic choices, this comes down to: What are the effects (on the reader) of showing a conversation? What are the effects of describing the conversation? Which effects do I want?
A description of a conversation is a summary of the conversation, summarized from a particular point of view for a particular purpose. A description is a personal response to the thing described, and so says something about the describer. And it's model of the conversation, and like all models it distorts the thing it describes.
Description necessarily distorts the thing described. This makes it less informative about the thing described, but potentially more informative about the describer.
The questions that come to my mind are:
How does the description differ from the conversation? Which details are left out? Which are included? What details, if any, are added to the description that didn't actually happen in the conversation? What does each deletion, inclusion, addition, and other distortion tell the reader about the narrator?
What words does the narrator use to summarize the conversation? What commentary does the narrator make on the conversation? What do those choices convey about the narrator's attitude toward the conversation or toward particular details?
Showing the conversation allows us readers to draw our own conclusions about participants' intentions, feelings, and thoughts. This, in addition to their words, helps us to characterize the participants. And drawing conclusions ourselves helps us to participate emotionally in the dialogue.
There are probably lots of other kinds of effects that I'm forgetting right now. But that's how I'd approach the question: Which effects do you want to create in the reader?
Dale