You're kidding, right??
The ONLY thing the Pilgrims had to go on, were the descriptions of others who had previously made the three month journey. By 1620, it wasn't exactly guaranteed money that a ship would make it all the way here.
They left perfectly good land in Holland (at least the Mayflower Pilgrims did), for the chance to work like DOGS, and to BUILD an entirely new society based on THEIR beliefs.
And for the chance to build that society completely from scratch.
I think that took a lot of courage. Looking into the unknown is fairly safe, but to boldly venture out into it is exponentially more courageous. Separatists are not easily frightened.
Would YOU agree to be an indentured servant, in order to make it to a place where your survival was NOT guaranteed, and where your only reward would be FREEDOM??
Holland was a cesspool of immorality, hostility and oppression (even then). Religious persecution was a reality in England, and martyrdom the fate of Europeons with faith in God as Supreme Ruler, and belief that men make petty, jealous tyrants. The emigrants were refugees in Holland. These simple, poor people - powerless with no opportunity for advancement, land ownership or self-determination had a dream that could not be realized in their Old World.