If there were intelligent aliens on a 'water planet,' would their environment hinder/ cap their technology? (details )

Hypothetically.

A planet that has no dry land, or ice , only ocean, and a molten core that keeps the water warm through hydrothermal vents developed life. Eventually intelligent life,say equal,or better/smarter than us.

Would the fact they are underwater stop them from creating or harnessing certain capabilities?

How would they work with metal for instance?

Would they be forever stuck on their planet, despite being very smart? (hard to build spacecraft underwater, without the ability to make fire.)

Would such an environment be too challenging for them to have much more than stone age technology?