If legislators weren't afforded immunities, how would the democratic process suffer?

there wouldn't be enough legislative options

Representatives will be unable to support the rights of the people effectively.

Explanation:

Legislative immunity provides senators and representatives the right to speak and state their opinions in the Congress without any fear of arbitrary arrest or defamation. This is done not to ensure the interest of the speaker but to protect the voice of the people which the speaker is representing. In a democracy the voice of the people is taken into account without fail. Therefore, the need to protect the representatives to speak or state their opinions in the Congress on behalf of the people becomes mandatory. If the provision of legislative immunity is not allowed, the essence of democratic process to represent and support the rights of the people would be ineffective.