Why did Skynet Build A Human Time Machine??

In the Terminator, The Time traveler must be a living organism or be surrounded by living tissue. This is because living tissue generates the bioelectric field needed to activate the Time Displacement Equipment (TDE).

It's a One-way trip Once a traveler goes back in time, they can't return without another TDE at their destination. So that begs the question why did Skynet even create a time machine for human use? Why didn't they make it for terminators and why didn't they want the terminator to be able to return?

Is it because they already made the terminators to be more like humans with living flesh etc so they had to make it like that just to adjust to them?

In the Terminator, The Time traveler must be a living organism or be surrounded by living tissue. This is because living tissue generates the bioelectric field needed to activate the Time Displacement Equipment (TDE).

It's a One-way trip Once a traveler goes back in time, they can't return without another TDE at their destination. So that begs the question why did Skynet even create a time machine for human use? Why didn't they make it for terminators and why didn't they want the terminator to be able to return?

Is it because they already made the terminators to be more like humans with living flesh etc so they had to make it like that just to adjust to them?